<template>
  <div>
    <!--面包屑导航区-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!--卡片视图区-->
    <el-card>
      <!--角色添加按钮-->
      <el-row>
        <el-col>
        <el-button type = "primary">添加角色</el-button>
        </el-col>
      </el-row>

      <!--展示图表信息-->
      <el-table :data="rolesList"  border stripe>
        <!--展开列-->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <!--为了画出上下都有边框的一条线-->
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '','vcenter']" v-for="(item1,i1) in scope.row.children"
                    :key="item1.id" >
            <!--<el-row>-->
            <!--一级权限宽度-->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!--二级权限宽度-->
              <el-col :span="19">
                <el-row :class="[i2 === 0 ? '' : 'bdtop','vcenter']" v-for="(item2,i2) in item1.children"
                        :key="item2.id" >
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <!--<el-row v-for="(item3,i3) in item2.children">-->
                    <el-tag type="warning" v-for="(item3,i3) in item2.children"
                            :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                    <!--</el-row>-->
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!--<pre>-->
              <!--{{scope.row}}-->
            <!--</pre>-->
          </template>
        </el-table-column>

        <!--索引列-->
        <el-table-column type="index"></el-table-column>
        <el-table-column prop="roleName" label="角色名称"></el-table-column>
        <el-table-column prop="roleDesc" label="角色描述"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <!--操作栏中的三个按钮-->
            <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
            <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
            <el-button type="warning" icon="el-icon-setting" size="mini"
                       @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!--树形控件-->
      <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id"
               default-expand-all  :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer" >
      <el-button @click="setRightDialogVisible = false">取 消</el-button>
      <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>

  </div>
</template>

<script>
  export default {
    name: 'roles',
    data(){
      return{
        // 所有角色列表数据
        rolesList:[],
        // 控制分配权限对话框的显示与隐藏的标志位
        setRightDialogVisible: false,
        // 所有权限的数据
        rightslist: [],
        // 树形控件的属性绑定对象
        treeProps: {
          label: 'authName',
          children: 'children'
        },
        // 默认选中的节点Id值数组
        defKeys: [],
        // 当前即将分配权限的角色id
        roleId: ''
      }
    },
    created(){
      //点击页面自动触发，获取所有权限
      this.getRolesList();
    },
    methods:{
      //获取所有权限列表
      async getRolesList(){
        const {data: res} = await this.$http.get('roles')
        if(res.meta.status !== 200){
          return this.$message.error('获取角色列表失败')
        }
        console.log('获取列表成功')
        this.rolesList = res.data;
        console.log(this.rolesList)

      },
      //移除相应人员的权限函数
      async removeRightById(role, rightId){
        const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
        //若点击取消，则给予相应的提示
        if (confirmResult !== 'confirm') {
          return this.$message.info('取消了删除！')
        }
        // return this.$message.info('确认了删除！')
        //若点击取消，则给予相应的提示
        const { data: res } = await this.$http.delete(
          `roles/${role.id}/rights/${rightId}`
        )
        //若点击确认，则向后端发送相应的请求
        if (res.meta.status !== 200) {
          return this.$message.error('删除权限失败！')
        }
        //这个有点奇怪，为啥赋值给一个形参可以呢？
        role.children = res.data
        // this.getRolesList()

      },
      //设置或分配权限对话框展示的标志位控制函数
      async showSetRightDialog(role){
        this.roleId = role.id
        //发起请求
        const { data: res } = await this.$http.get('rights/tree')
        if (res.meta.status !== 200) {
          return this.$message.error('获取权限数据失败！')
        }
        // 把获取到的权限数据保存到 data 中
        this.rightslist = res.data
        // console.log(this.rightslist)

        // 递归获取三级节点的Id
        this.getLeafKeys(role, this.defKeys)
        this.setRightDialogVisible = true;
      },
      // 难 看不懂 通过递归的形式，获取角色下所有三级权限的id，并保存到 defKeys 数组中
      getLeafKeys(node, arr) {
        // 如果当前 node 节点不包含 children 属性，则是三级节点
        if (!node.children) {
          return arr.push(node.id)
        }

        node.children.forEach(item => this.getLeafKeys(item, arr))
      },
      // 监听分配权限对话框的关闭事件
      setRightDialogClosed() {
        this.defKeys = []
      },
      // 点击为角色分配权限
      async allotRights() {
        //调用element库函数获取节点，节点以数组形式返回
        const keys = [
          ...this.$refs.treeRef.getCheckedKeys(),
          ...this.$refs.treeRef.getHalfCheckedKeys()
        ]
        // console.log(keys)
        //将以节点返回的数组，用逗号进行拼接
        const idStr = keys.join(',')

        //将没问题的数据发送给后端
        const { data: res } = await this.$http.post(
          `roles/${this.roleId}/rights`,
          { rids: idStr }
        )

        if (res.meta.status !== 200) {
          return this.$message.error('分配权限失败！')
        }

        this.$message.success('分配权限成功！')
        this.getRolesList()
        this.setRightDialogVisible = false
      },
      // 点击按钮，分配角色
      async saveRoleInfo() {
        if (!this.selectedRoleId) {
          return this.$message.error('请选择要分配的角色！')
        }

        const { data: res } = await this.$http.put(
          `users/${this.userInfo.id}/role`,
          {
            rid: this.selectedRoleId
          }
        )
        console.log(res.meta.status)
        if (res.meta.status !== 200) {
          return this.$message.error('更新角色失败！')
        }

        this.$message.success('更新角色成功！')
        this.getUserList()
        this.setRoleDialogVisible = false
      },
    }
  }
</script>

<style lang="less" scoped>
.el-tag{
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}

</style>
